Tasmodorbis punctatus Ponder & Avern, 2000 Diagnostic features Shell planorbid-like, planispiral to slightly hyperstrophic, sculptured with close rounded axial ribs and very close, even spiral threads. Rest of shell simple, with convex whorls and close Tasmodorbis punctatus (adult size 1.6-2.1 mm) Distribution of Tasmodorbis punctatus. collabral growth lines, less tightly coiled than in other members of family. No distinct umbilical area because of the very shallow, slightly concave base. nterior of shell with shell pores. Operculum circular, multispiral and lacking pustules on external surface. This species differs from other glacidorbids in its axial and spiral protoconch sculpture, circular multispiral operculum and the unique shell pores on the inner surface of the shell. Classification Tasmodorbis punctatus Ponder & Avern, 2000 Class Gastropoda I nfraclass Heterobranchia I nfrasubcohort Panpulmonata Superorder Pyropulmonata Order Amphibolida Suborder Glacidorbina Superfamily Glacidorboidea Family Glacidorbidae Tasmodorbis Ponder & Avern, 2000 (Type species: Tasmodorbis punctatus Ponder and Avern 2000). Original name: Tasmodorbis punctatus Ponder & Avern, 2000. Ponder, W. F. and. Avern, G. J. (2000). The Glacidorbidae (Mollusca: Gastropoda: (Heterobranchia) of Australia. Records of the Australian Museum 52: 307ĕ353. Type locality: Wandle River on Murchison Hwy, north of Waratah, Tasmania. Biology and ecology n small streams, lakes, springs and swamps, amongst moss, roots of water plants and similar substrates. Distribution North-western and western Tasmania. Further reading Beesley, P. L., Ross, G. J. B. & Wells, A., Eds. (1998). Mollusca: The Southern Synthesis. Parts A & B. Melbourne, CSRO Publishing. Ponder, W. F. (1986b). Glacidorbidae (Glacidorbacea: Basommatophora), a new family and superfamily of operculate freshwater gastropods. Zoological Journal of the Linnean Society 87: 53-83. Ponder, W. (2019). Glacidorbidae Ponder, 1986. Pp. 143-144 in C. Lydeard & Cummings, K. S. Freshwater Mollusks of the World: a Distribution Atlas. Baltimore, John Hopkins University Press. Ponder, W. F. & Avern, G. J. (2000). The Glacidorbidae (Mollusca: Gastropoda: Heterobranchia) of Australia. Records of the Australian Museum 52: 307-353. Rumi, A., Gutiérrez Gregoric, D. E., Landoni, N., Cárdenas Mancilla, J., Gordillo, S., Gonzalez, J., & Alvarez, D. (2015). Glacidorbidae (Gastropoda: Heterobranchia) in South America: revision and description of a new genus and three new species from Patagonia. Molluscan Research 35: 143-152. To cite this resource: Ponder, W. F., Hallan, A., Shea, M. and Clark, S. A., Richards, K., Klungzinger, M., and Kessner, V. 2020. Australian Freshwater Molluscs. https://keys.lucidcentral.org/keys/v3/freshwater_molluscs/ To contact the authors for comment or suggestions, please email: [email protected] Copyright © 2020. All rights reserved. The Australian Museum. .